AZGS's Brian Gootee characterizes the Redwall Limestone of Grand Canyon, Arizona, in a 27-page powerpoint PDF. Download free at http://repository.azgs.az.gov/uri_gin/azgs/dlio/1572 . The cavernous Redwall Limestone 99.5% pure limestone that formed in the Mississippian about 350 Ma. Today, the Redwall is an important source of freshwater in central and northern Arizona.
Photographer: Brian Gootee
Photo Date: 2014
Photo Location Accuracy: Approximately Located
Photo Tags: Redwall Limestone, Mississippian, fossils, caverns, groundwater, aquifer